Fontconfig error: Cannot load default config file: No such file: (null)

[shaozhihua]

my computer X64 intel
Qt5 MSVC2019 compiler
and my code is:

I tried many methods ,but no works,
so I come here,and ask the author and distributers.
I really appreciate you guys!thanks!

[shaozhihua]

I used vcpkg command to install the x64 osg lib;

[robertosfield]

I have never used FontConfig personally and the error message looks like it's being emitted from FontConfig rather than the OSG/vsgEarth so the issue may lie with FontConfig setup, in which case you'll need to read up about FontConfig.

[shaozhihua]

@robertosfield oh，I found the solution about this error:
create a new ENVIRNMENT variable：FONTCONFIG_PATH
and the value of this ENV Variable is the path of "fonts.conf".